NiAl-layered double hydroxides stabilized Pt clusters with enhanced metal-support interaction: Boosting hydrogen isotope separation

Li, Peilong; Hu, Xiaoyu; Zhang, Zexuan; Zhang, Xin; Zeng, Ning; Hu, Cun; Yu, Bin; Hu, Xuanhao; Song, Jiangfeng; Shi, Yan; Zhou, Linsen; Luo, Wenhua

doi:10.1016/j.apsusc.2022.155780

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…A stronger interaction is indicated by a more negative E b value. The E b of the Pt cluster on graphite, as shown in Figure e, is −1.06 eV, which is comparable with earlier DFT results of −1.16 eV . Contrarily, the binding energy of the Pt cluster on CrN is −4.90 eV, confirming that Pt adsorbs more strongly on CrN compared to graphite.…”

Section: Resultssupporting

confidence: 89%

“…The E b of the Pt cluster on graphite, as shown in Figure 3e, is −1.06 eV, which is comparable with earlier DFT results of −1.16 eV. 56 Contrarily, the binding energy of the Pt cluster on CrN is −4.90 eV, confirming that Pt adsorbs more strongly on CrN compared to graphite. This indicates the presence of the SMSI effect in the Pt/CrN model, efficiently stabilizing the Pt metal atoms and preventing the exfoliation of metal nanoparticles during reactions.…”

Section: Structural and Surface Characterization Of Catalystssupporting

confidence: 89%

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Controllable Porous Nanogrids of Chromium Nitride with Strong Metal–Support Interactions for Achieving Stable Oxygen Reduction Reaction

Lin,

Chen,

Huo

et al. 2024

ACS Sustainable Chem. Eng.

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To facilitate the extensive adoption of proton exchange membrane fuel cells (PEMFCs), it is important to address the issues of electrochemical corrosion and weak interaction with platinum (Pt) caused by the carbon support. Herein, a strong metal−support interaction (SMSI) effect was constructed with Pt nanoparticles loaded in porous chromium nitride (CrN) nanogrids (labeled as Pt/CrN). The porous CrN nanogrids are synthesized via a Maillard nitridation method, and better support size was obtained by controlling the average diameter of CrN nanoparticles by adjusting the proportion of precursors in the oxide preparation. Electrochemical tests establish that Pt/CrN is a stable oxygen reduction reaction catalyst with halfwave potential attenuated by only 4.5 mV after accelerated durability tests, which can be a result of the SMSI effect between Pt and CrN. Moreover, CrN was shown to modulate the ionomer distribution in the catalyst layer (CL). Further investigations have revealed that CrN remains stable up to 1.2 V but degrades significantly above 1.4 V. This work not only broadens the spectrum of Pt-based catalyst support options but also provides insights into the engineering of the SMSI effect. This knowledge will benefit the future design of transition metal nitride for PEMFCs and other technologies.

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Section: Resultssupporting

confidence: 89%

Section: Structural and Surface Characterization Of Catalystssupporting

confidence: 89%